Explain that no need to use sudo pio ...

platformio/commands/lib.py

@@ -33,8 +33,7 @@ from platformio.util import get_api_result
     "-g",
     "--global",
     is_flag=True,
-    help="Manage global PlatformIO"
-    " library storage `%s`" % join(util.get_home_dir(), "lib"))
+    help="Manage global PlatformIO library storage")
 @click.option(
     "-d",
     "--storage-dir",

platformio/exception.py

@@ -226,7 +226,8 @@ class UpgradeError(PlatformioException):
 class HomeDirPermissionsError(PlatformioException):
 
     MESSAGE = "You do not have permissions to PlatformIO home directory.\n"\
-              "Please remove `{0}` folder manually and repeat operation."
+              "Please remove `{0}` folder manually and avoid using "
+              "`sudo pio ...`."
 
 
 class CygwinEnvDetected(PlatformioException):